Python Program for expm1() Function

In the previous article, we have discussed Python Program for exp() Function
expm1() Function in Python:

E^x – 1 is returned by the math.expm1() method.

‘E’ is the natural logarithmic system’s base (approximately 2.718282), and x is the number passed to it.

This function is more precise than using math. exp() and subtracting 1.

Syntax:

math.expm1(x)

Parameters:

x: This is required. It is a number. The exponent is specified.

Return Value:

It returns a value float value which represents E^x – 1.

Examples:

Example1:

Input:

Given Number = 3

Output:

The result after applying expm1() function on above given number 3  =  19.085536923187668

Example2:

Input:

Given Number = 5.5

Output:

The result after applying expm1() function on above given number 5.5  =  243.69193226422038

Method #1: Using Built-in Functions (Static Input)

Approach:

Import math module using the import keyword.
Give the list as static input and store it in a variable.
Give the first number as static input and store it in another variable.
Apply math.expm1() function to the given first number to calculate the value E raised to the power of given number-1.(E =approximately 2.718282)
Store it in another variable.
Print the above result.
Similarly, do the same for the other number.
Apply math.expm1() function to the given list element and print it.
The Exit of Program.

Below is the implementation:

# Import math module using the import keyword.
import math
# Give the list as static input and store it in a variable.
gvn_lst = [9, 4, 5, 2, 1]
# Give the first number as static input and store it in another variable.
gvn_numb1 = 3
# Apply math.expm1() function to the given first number to calculate the value
# E raised to the power of given number-1.(E =approximately 2.718282)
# Store it in another variable.
fnl_rslt = math.expm1(gvn_numb1)
print("The result after applying expm1() function on above given first number",
      gvn_numb1, " = ", fnl_rslt)
# similarly do the same for the other number.
gvn_numb2 = 5.5
print("The result after applying expm1() function on above given second number",
      gvn_numb2, " = ", math.expm1(gvn_numb2))
# Apply math.expm1() function to the given list element and print it.
print(
    "The result after applying expm1() function on given list element gvnlst[1] = ", math.expm1(gvn_lst[1]))

Output:

The result after applying expm1() function on above given first number 3  =  19.085536923187668
The result after applying expm1() function on above given second number 5.5  =  243.69193226422038
The result after applying expm1() function on given list element gvnlst[1] =  53.598150033144236

Method #2: Using Built-in Functions (User Input)

Approach:

Import math module using the import keyword.
Give the list as user input using list(),map(),input(),and split() functions.
Store it in a variable.
Give the first number as user input using the float(input()) function and store it in a variable.
Apply math.expm1() function to the given first number to calculate the value E raised to the power of given number-1.(E =approximately 2.718282)
Store it in another variable.
Print the above result.
Similarly, do the same for the other number.
Apply math.expm1() function to the given list element and print it.
The Exit of Program.

Below is the implementation:

# Import math module using the import keyword.
import math
# Give the list as user input using list(),map(),input(),and split() functions.
# Store it in a variable.
gvn_lst = list(map(float, input(
    'Enter some random List Elements separated by spaces = ').split()))
# Give the first number as user input using the float(input()) function
# and store it in a variable.
gvn_numb1 = float(input("Enter some random number = "))
# Apply math.expm1() function to the given first number to calculate the value
# E raised to the power of given number-1.(E =approximately 2.718282)
# Store it in another variable.
fnl_rslt = math.expm1(gvn_numb1)
print("The result after applying expm1() function on above given first number",
      gvn_numb1, " = ", fnl_rslt)
# similarly do the same for the other number.
gvn_numb2 = float(input("Enter some random number = "))
print("The result after applying expm1() function on above given second number",
      gvn_numb2, " = ", math.expm1(gvn_numb2))
# Apply math.expm1() function to the given list element and print it.
print(
    "The result after applying expm1() function on given list element gvnlst[2] = ", math.expm1(gvn_lst[2]))

Output:

Enter some random List Elements separated by spaces = 46 2 1 80 2
Enter some random number = 4
The result after applying expm1() function on above given first number 4.0 = 53.598150033144236
Enter some random number = 3.5
The result after applying expm1() function on above given second number 3.5 = 32.11545195869231
The result after applying expm1() function on given list element gvnlst[2] = 1.718281828459045

Know all about Mathematical Functions in Python by going through our Python Mathematical Methods Examples well explained step by step.